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US2568561A
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US
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Means for indicating the position of an automatic locking device for pistons or other movable parts
Assignee: Electro Hydraulics Ltd
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Filing: 1948-08-23
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Granted: 1951-09-18
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Expires: 1968-08-23
Abstract
No abstract record available.
Inventors
- 👤 Perdue Jack
- 👤 Hackney Stanley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:00
CPC Classifications
B; B64; B64C; B64C25/00; B64C25/02; B64C25/08; B64C25/10; B64C25/18; B64C25/22; F; F15; F15B; F15B15/00; F15B15/20; F15B15/26; F15B15/261
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2295961A
Cited
US2297902A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-09-17 | 1955-03-19 | 1955-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-17 | 1959-03-19 | 1959-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-17 | 1963-03-19 | 1963-09-18 | $7700.00 | Window Closed / Lapsed |